Obsidian hydration dating is based on the fact that

Obsidian obeys the property of mineral hydration, and absorbs water, when exposed to air, at well defined rate.When an unworked nodule of obsidian is initially fractured, there is typically less than 1% water present.In essence it is a technique with a large resolution on a plethora of chemical elements and molecular structures in an essentially non destructive manner.

Fw-300 .qstn-title #ya-trending-questions-show-more, #ya-related-questions-show-more #ya-trending-questions-more, #ya-related-questions-more /* DMROS */ .The first step concerns the calculation of a 3rd order fitting polynomial of the SIMS profile (eq.1).The second stage regards the determination of the saturation layer, i.e. The whole computing processing is embedded in stand-alone software created in Matlab (version 7.0.1) software package with a graphical user interface and executable under Windows XP.In fact, the saturation layer on the surface forms up to a certain depth depending on factors that include the kinetics of the diffusion mechanism for the water molecules, the specific chemical structure of obsidian, as well as the external conditions affecting diffusion (temperature, relative humidity, and pressure).Together these factors result in the formation of an approximately constant, boundary concentration value, in the external surface layer.

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